package J20250426;

public class Computer {
    public void powerOn(){
        System.out.println("笔记本打开");
    }
    public void powerOff(){
        System.out.println("笔记本关闭");
    }
    public void useDevice(USB usb){
        usb.openDevice();
        if(usb instanceof Mouse){
            Mouse mouse=(Mouse) usb;
            mouse.click();
        }else if (usb instanceof KeyBoard){
            KeyBoard keyboard=(KeyBoard) usb;
            KeyBoard.input();
        }
        usb.closeDevice();
    }
}
